The FAA said the ground stop was lifted at around 8:50 a.m. and normal air traffic operations were resuming gradually, as it continues to look into the cause of the problem.
Flights were temporarily halted after the accident, which is under investigation by the Federal Aviation Administration and the National Transportation Safety Board.
Viral TikTok videos shows a police officer threatening stranded passengers at Nashville International Airport with arrest if they don't vacate an area.
The airline acknowledged that it had been crippled by winter weather and said it plans to fly about one-third of its schedule in the coming days as it recovers.